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- What does $$, $?, $^ represent in powershell? - Stack Overflow
In PowerShell, a dollar sign preceding a name indicates a variable The symbols in question are just special cases of variables provided by the PowerShell environment They are also known as "automatic" variables More specifically: $$ is a variable containing the last token of the last line input into the shell (does not contain the whole command)
- powershell - How to effectively use the `-Filter` parameter on Active . . .
The -Filter string is very much like Powershell syntax (not quite, but most of the way there) You can use most of the same logical operators that Powershell supports, and they work much in the same way that Powershell operators do This answer aims to clarify this and explain how to use this elusive parameter
- What does the @ symbol do in PowerShell? - Stack Overflow
Because this type of question (what does 'x' notation mean in PowerShell?) is so common here on StackOverflow as well as in many reader comments, I put together a lexicon of PowerShell punctuation, just published on Simple-Talk com Read all about @ as well as % and # and $_ and ? and more at The Complete Guide to PowerShell Punctuation
- Can I get or -and to work in PowerShell? - Stack Overflow
Quick Tip: With Powershell if you need to use the where command for the same result as you get in CMD, you can't just use where, you need to use where exe (with the extension), because without the extension Powershell uses an alias to its own version of the where command –
- What does mean % , $_ and @ in Powershell? - Stack Overflow
Another good resource is About Automatic Variables, which will list PowerShell's reserved automatic variables They are created and maintained by PowerShell You will notice there are some variables that have non-alpha and non-numeric characters
- windows - How to run a PowerShell script - Stack Overflow
powershell starts an PowerShell and runs the command specified in quotation marks gc '%~0' is the first command that runs in PowerShell It reads the content of the current file, as '%~0' is replaced by the current script location
- regex - Matching strings in PowerShell - Stack Overflow
PowerShell string-comparison operators are case-insensitive by default (unlike the string operators, which use the invariant culture, the regex operators seem to use the current culture, though that difference rarely matters in regex operations) You can opt into case-sensitive matching by using prefix c; e g , -cmatch instead of -match
- Multiple -and -or in PowerShell Where-Object statement
By wrapping your comparisons in {} in your first example you are creating ScriptBlocks; so the PowerShell interpreter views it as Where-Object { <ScriptBlock> -and <ScriptBlock> } Since the -and operator operates on boolean values, PowerShell casts the ScriptBlocks to boolean values In PowerShell anything that is not empty, zero or null is true
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